<?php
/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * @author Chirag Shah <chirags@google.com>
 */
class Google_BatchRequest
{
    /** @var string Multipart Boundary. */
  private $boundary;
  /** @var array service requests to be executed. */
  private $requests = array();
    public function __construct($boundary = false)
    {
        $boundary = (false == $boundary) ? mt_rand() : $boundary;
        $this->boundary = str_replace('"', '', $boundary);
    }
    public function add(Google_HttpRequest $request, $key = false)
    {
        if (false == $key) {
            $key = mt_rand();
        }
        $this->requests[$key] = $request;
    }
    public function execute()
    {
        $body = '';
    /** @var Google_HttpRequest $req */
    foreach ($this->requests as $key => $req) {
        $body .= "--{$this->boundary}\n";
        $body .= $req->toBatchString($key)."\n";
    }
        $body = rtrim($body);
        $body .= "\n--{$this->boundary}--";
        global $apiConfig;
        $url = $apiConfig['basePath'].'/batch';
        $httpRequest = new Google_HttpRequest($url, 'POST');
        $httpRequest->setRequestHeaders(array(
        'Content-Type' => 'multipart/mixed; boundary='.$this->boundary, ));
        $httpRequest->setPostBody($body);
        $response = Google_Client::$io->makeRequest($httpRequest);
        $response = $this->parseResponse($response);

        return $response;
    }
    public function parseResponse(Google_HttpRequest $response)
    {
        $contentType = $response->getResponseHeader('content-type');
        $contentType = explode(';', $contentType);
        $boundary = false;
        foreach ($contentType as $part) {
            $part = (explode('=', $part, 2));
            if (isset($part[0]) && 'boundary' == trim($part[0])) {
                $boundary = $part[1];
            }
        }
        $body = $response->getResponseBody();
        if ($body) {
            $body = str_replace("--$boundary--", "--$boundary", $body);
            $parts = explode("--$boundary", $body);
            $responses = array();
            foreach ($parts as $part) {
                $part = trim($part);
                if (!empty($part)) {
                    list($metaHeaders, $part) = explode("\r\n\r\n", $part, 2);
                    $metaHeaders = Google_CurlIO::parseResponseHeaders($metaHeaders);
                    $status = substr($part, 0, strpos($part, "\n"));
                    $status = explode(' ', $status);
                    $status = $status[1];
                    list($partHeaders, $partBody) = Google_CurlIO::parseHttpResponse($part, false);
                    $response = new Google_HttpRequest('');
                    $response->setResponseHttpCode($status);
                    $response->setResponseHeaders($partHeaders);
                    $response->setResponseBody($partBody);
                    $response = Google_REST::decodeHttpResponse($response);
          // Need content id.
          $responses[$metaHeaders['content-id']] = $response;
                }
            }

            return $responses;
        }

        return null;
    }
}
